作者：陈亚宇1, 李文举1, 张维民1, 陈月2, 马天行1
作者单位：1. 河北工程大学机械与装备工程学院，河北 邯郸 056038;
2. 河北建设集团安装工程有限公司，河北 保定 071000
关键词：渗漏定位;弹性波;波速反演;防渗层;垃圾填埋场
摘要：
为解决运营中垃圾填埋场防渗层渗漏定位问题，提出基于波速反演模型的渗漏定位方法。利用所测非均匀粘土层波速均值作为时差定位波速进行破损点定位；考虑渗滤液对弹性波波速影响特性，反演出粘土层波速畸变区域进行渗漏点定位。通过在防渗层下平铺双层加速度传感器及诱震器，当接收到HDPE膜破损信号时，利用诱震器发射与破损信号相同频率弹性波测出粘土层波速均值进行破损点定位；当填埋场运营噪音导致无法接收破损信号时，通过诱震器发射固定频率弹性波生成波速层析图进行渗漏点定位。试验结果表明：在破损点定位中，实际破损坐标与定位坐标在XY平面和Z平面距离偏差最大值分别为2.44 cm，2.5 cm；在渗漏点定位中，实际渗漏位置与反演推测距离偏差最大值为9.24 cm，均符合工程误差要求。
Research on leakage location method of impervious layer based on wave velocity inversion model
CHEN Yayu1, LI Wenju1, ZHANG Weimin1, CHEN Yue2, MA Tianhang1
1. College of Mechanical and Equipment Engineering, Hebei University of Engineering, Handan 056038, China;
2. Hebei Construction Group Installation Engineering Co., Ltd., Baoding 071000, China
Abstract: In order to solve the leakage location problem of the anti-seepage layer of the garbage landfill in operation, a leakage location method based on the wave velocity inversion model is proposed. The average value of the measured non-uniform clay layer wave velocity is used as the time difference location wave velocity to locate the damage point; considering the characteristics of the influence of leachate on the elastic wave velocity, the leakage point location is inversely performed in the clay layer wave velocity distortion area. By laying the double-layer acceleration sensor and shock absorber under the impermeable layer, when the HDPE membrane damage signal is received, the average value of the clay layer wave velocity is measured by using the shock absorber to emit the same frequency elastic wave as the damage signal to locate the damage point; When the operating noise of the landfill site makes it impossible to receive the damage signal, a fixed-frequency elastic wave is used to generate a wave velocity tomogram to locate the leakage point. The test results show that in the location of the damage point, the maximum distance deviation between the actual damage coordinate and the location coordinate in the XY plane and the Z plane are 2.44 cm and 2.5 cm, respectively; in the location of the leakage point, the actual leakage location and the inversion inferred distance The maximum deviation is 9.24 cm, which meets the engineering error requirements.
Keywords: leakage location;elastic wave;wave velocity inversion;impervious layer;landfill
2023, 49(4):1-6 收稿日期: 2021-10-12;收到修改稿日期: 2021-12-22
基金项目: 河北省省级科技计划资助项目（20373901D）；国家自然科学基金项目（51807047）
作者简介: 陈亚宇(1984-),男,河北新河县人,教授,博士,研究方向为过程检测与控制
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